The Foreign Relations of the United States series is the official documentary historical record of major U.S. foreign policy decisions that have been declassified and edited for publication. The series is produced by the State Department's Office of the Historian and printed volumes are available from the Government Printing Office.

Does your topic have anything to do with rights? This is a worthwhile website to cruise through...read the information in here as well because there's GREAT historical context related to the time period of your topic even if there aren't any sources directly related.